[TypeFeedbackVector] Root feedback vectors at function literal site.

src/runtime/runtime-scopes.cc

Index: src/runtime/runtime-scopes.cc
diff --git a/src/runtime/runtime-scopes.cc b/src/runtime/runtime-scopes.cc
index 6e0f6fe21370bb3e17a39d0a456246ab01d390ed..50f5704f3275a5566eb9ef087fdbce8671716c97 100644
--- a/src/runtime/runtime-scopes.cc
+++ b/src/runtime/runtime-scopes.cc
@@ -139,6 +139,7 @@ Object* DeclareGlobals(Isolate* isolate, Handle<FixedArray> declarations,
   FOR_WITH_HANDLE_SCOPE(isolate, int, i = 0, i, i < length, i += 4, {
     Handle<String> name(String::cast(declarations->get(i)), isolate);
     FeedbackVectorSlot slot(Smi::cast(declarations->get(i + 1))->value());
+    Handle<Object> possibly_literal_slot(declarations->get(i + 2), isolate);
     Handle<Object> initial_value(declarations->get(i + 3), isolate);
 
     bool is_var = initial_value->IsUndefined(isolate);
@@ -147,12 +148,17 @@ Object* DeclareGlobals(Isolate* isolate, Handle<FixedArray> declarations,
 
     Handle<Object> value;
     if (is_function) {
+      DCHECK(possibly_literal_slot->IsSmi());
       // Copy the function and update its context. Use it as value.
       Handle<SharedFunctionInfo> shared =
           Handle<SharedFunctionInfo>::cast(initial_value);
+      FeedbackVectorSlot literals_slot(
+          Smi::cast(*possibly_literal_slot)->value());
+      Handle<Cell> literals(Cell::cast(feedback_vector->Get(literals_slot)),
+                            isolate);
       Handle<JSFunction> function =
-          isolate->factory()->NewFunctionFromSharedFunctionInfo(shared, context,
-                                                                TENURED);
+          isolate->factory()->NewFunctionFromSharedFunctionInfo(
+              shared, context, literals, TENURED);
       value = function;
     } else {
       value = isolate->factory()->undefined_value();
@@ -612,10 +618,14 @@ RUNTIME_FUNCTION(Runtime_NewClosure) {
   HandleScope scope(isolate);
   DCHECK_EQ(3, args.length());
   CONVERT_ARG_HANDLE_CHECKED(SharedFunctionInfo, shared, 0);
+  CONVERT_ARG_HANDLE_CHECKED(TypeFeedbackVector, vector, 1);
+  CONVERT_SMI_ARG_CHECKED(index, 2);
   Handle<Context> context(isolate->context(), isolate);
+  FeedbackVectorSlot slot = TypeFeedbackVector::ToSlot(index);
+  Handle<Cell> literals(Cell::cast(vector->Get(slot)), isolate);
   Handle<JSFunction> function =
-      isolate->factory()->NewFunctionFromSharedFunctionInfo(shared, context,
-                                                            NOT_TENURED);
+      isolate->factory()->NewFunctionFromSharedFunctionInfo(
+          shared, context, literals, NOT_TENURED);
   return *function;
 }
 
@@ -624,12 +634,16 @@ RUNTIME_FUNCTION(Runtime_NewClosure_Tenured) {
   HandleScope scope(isolate);
   DCHECK_EQ(3, args.length());
   CONVERT_ARG_HANDLE_CHECKED(SharedFunctionInfo, shared, 0);
+  CONVERT_ARG_HANDLE_CHECKED(TypeFeedbackVector, vector, 1);
+  CONVERT_SMI_ARG_CHECKED(index, 2);
   Handle<Context> context(isolate->context(), isolate);
+  FeedbackVectorSlot slot = TypeFeedbackVector::ToSlot(index);
+  Handle<Cell> literals(Cell::cast(vector->Get(slot)), isolate);
   // The caller ensures that we pretenure closures that are assigned
   // directly to properties.
   Handle<JSFunction> function =
       isolate->factory()->NewFunctionFromSharedFunctionInfo(shared, context,
-                                                            TENURED);
+                                                            literals, TENURED);
   return *function;
 }